Apparatus for producing draft in smoke-stacks or chimneys



(No Model.)

B. GAUL. APPARATUS FOR PRODUCING DRAFT IN SMOKE STAGKS AND GHIMNEYS.

Patent-ed Jan. 9, 1894.

UNITED STATES PATENT OFFICE.

RAY GAUL, OF BROOKLYN, YORK.

APPARATUS FOR PRODUCING DRAFT IN SMOKE-STACKS 0R CHIMNEYS.

SPECIFICATION forming part of Letters Patent No. 512,508, dated January9, 1894 Application filed April 26,1893.

To all whom it may concern.-

Be it known that I, RAY GAUL, of the city of Brooklyn, in the county ofKings and State of New York, haveinvented a new and useful Improvementin Apparatus for Producing Draft in Smoke-Stacks or Chimneys, of whichthe following is a specification.

The nature of the improvement will be described with reference to theaccompanying drawings and its novelty set forth in the claims.

Figure 1 represents a vertical section of the smoke stack to which myinvention is applied, and Fig. 2 represents a vertical sectional View ofa modification of a part of my apparatus.

A islhe smoke stack provided with an unobstructed top to permit theproducts of combustion to rise freely upwardly and off into the outsideair. The upper part of the stack is providedwith anu mberofcircumferentially arranged lateral openings at, a to which are fittedthe lower ends of a corresponding number of pipes 19 of upwardlytapering form which are turned or projected upward within the stack nearthe walls thereof for the entrance of air from without into the upperpart of the stack.

For the purpose of producing a rapid movement of the productsofcombustion through the stack in addition to the draft introduced by thecurrents of air which enter from the outside of the stack and aredischarged upwardly therein by the tubes b, I provide a blowingapparatus C'which may be of any suitable kind;arranged at any convenientdistance from the smoke stack. The blowing apparatus is arranged todeliver its air into an annular distributing pipe D from which it isdischarged into the tubes 1), through inner nozzles c, by means ofupright pipes d-one for each tube or pipe b-and which may either leadupward within the stack, as shown in Fig. 1, or outside the stack, asillustrated in Serial No. 471,897. (No model.)

Fig. 2. In the example shown in Fig. 2, the opening a to the upwardlyturned, taper pipe 1) instead of being in and through the wall of thestack is outside of the stack; and the inner nozzle 0 enters the saidpipe at the back instead of at the bottom.

In operation, the currents of air which are fed into the top of thestack and injected into the outwardly moving current of the products ofcombustion serve to form a shield around the upper edge of the stack toprevent the rapid burning out of the top of the stack which is socommon, particularly where the stacks are formed of iron, as in case ofstacks employed on board vessels.

What I claim is 1. The combination with a stack provided with anunobstructed top and having means adapted to be used in connectiontherewith for producing a rapid movement of the products of combustiontherethrough, ot' circumferentially arranged air tubes located near thetop of the stack and extending from the outside thereof to its interiorand adapted to discharge air into the current of products of combustionto form a shield for the top of the stack, substantially as set forth.

2. The combination with a stack provided with an unobstructed top andhaving means adapted to be used in connection therewith for producing arapid movement of the products of combustion therethrough, ofcircumferentially arranged air tubes of tapered form located near thetop of the stack and extending from the outside thereof to its interiorand adapted to discharge air into the current of products of combustionto form a shield for the top of the stack, substantially as set forth.

RAY GAUL.

Witnesses:

FREDK. HAYNES, GEORGE BARRY.

